12311720928 has 384 divisors, whose sum is σ = 42042470400. Its totient is φ = 3471206400.

The previous prime is 12311720891. The next prime is 12311721007. The reversal of 12311720928 is 82902711321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12311720892 and 12311720901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6614718 + ... + 6616578.

It is an arithmetic number, because the mean of its divisors is an integer number (109485600).

Almost surely, 2^12311720928 is an apocalyptic number.

12311720928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311720928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21021235200).

12311720928 is an abundant number, since it is smaller than the sum of its proper divisors (29730749472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12311720928 is a wasteful number, since it uses less digits than its factorization.

12311720928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1929 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 12311720928 in words is "twelve billion, three hundred eleven million, seven hundred twenty thousand, nine hundred twenty-eight".